<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<style>
#div1 {width:150px; height:200px; background:green; position:absolute; left:-150px;}
#div1 span {position:absolute; width:20px; height:60px; line-height:20px; background:blue; right:-20px; top:70px;}
</style>
<script>
window.onload=function ()
{
	var oDiv=document.getElementById('div1');
	
	oDiv.onmouseover=function ()
	{
		startMove();
	};
	oDiv.onmouseout=function ()
	{
		startMove2();
	};
};

var timer=null;

function startMove()
{
	var oDiv=document.getElementById('div1');
	
	clearInterval(timer);
	timer=setInterval(function (){
		if(oDiv.offsetLeft==0)
		{
			clearInterval(timer);
		}
		else
		{
			oDiv.style.left=oDiv.offsetLeft+10+'px';
		}
	}, 30);
}

function startMove2()
{
	var oDiv=document.getElementById('div1');
	
	clearInterval(timer);
	timer=setInterval(function (){
		if(oDiv.offsetLeft==-150)
		{
			clearInterval(timer);
		}
		else
		{
			oDiv.style.left=oDiv.offsetLeft-10+'px';
		}
	}, 30);
}
</script>
</head>

<body>
<div id="div1">
	<span>分享到</span>
</div>
</body>
</html>
